Security readout for executives and security teams
Plain-English summary
CVE-2020-9739 is a flaw in Adobe Media Encoder that can be triggered when a user opens a malicious file or visits a malicious page. The likely business impact is workstation disruption and possible exposure of sensitive memory contents from the affected application.
Executive priority
Prioritize remediation where Adobe Media Encoder is used by staff who receive external media. This is not shown as actively exploited, but it can affect confidentiality and availability through common user-driven file workflows.
Technical view
Adobe Media Encoder 14.3.2 and earlier contain an out-of-bounds read in FLV file parsing. The issue is classified as CWE-125 and has CVSS 3.1 score 6.1, with user interaction required and potential confidentiality impact plus limited availability impact.
Likely exposure
Exposure is most likely on endpoints or creative workstations running Adobe Media Encoder 14.3.2 or earlier, especially where users handle externally supplied media files. The bundle does not identify server-side exposure or affected products beyond Adobe Media Encoder.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires user interaction: opening a malicious file or visiting a malicious page. Treat this as plausible phishing or file-handling risk, not evidence of active exploitation.
Researcher notes
Evidence is limited to the CVE data and Adobe advisory reference. The affected component is FLV parsing, but the bundle does not provide technical root cause, exploit details, fixed version text, or indicators of compromise.
Mitigation direction
- Review Adobe APSB20-57 and update Adobe Media Encoder following Adobe's stated remediation guidance.
- Limit opening of untrusted FLV or other media files on affected workstations until remediated.
- Remove or disable Adobe Media Encoder where there is no business need.
- Use endpoint controls to quarantine unexpected media attachments from untrusted sources.
Validation and detection
- Inventory Adobe Media Encoder installations and record version numbers.
- Confirm whether any installation is version 14.3.2 or earlier.
- Check patch status against Adobe APSB20-57, not third-party assumptions.
- Review endpoint telemetry for crashes after handling unexpected media files.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-9739 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L1.84.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/media-encoder/apsb20-57.htmlCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.